我国机械油按40℃运动粘度分哪几个牌号？
参考答案：
N5、N7、N10、N15、N22、N32、N46、N68、N100、N150等10个牌号。
句型转换。
1. She doesn't like mooncakes because they are too sweet. (划线部分提问)
________ ________ she _______ mooncakes?
2. There are some elephants in the zoo. (改为单数意义的句子)
________ ________ elephant in the zoo
3. Simon walks his dog every day. (用now 替换every day)
Simon ________ ________ his dog now.
4. My mother has an egg and a glass of milk for breakfast. (对划线部分提问)
________ ________ your mother _______ for breakfast?
三个完全相同的长方体木块，竖放在水平桌面上，如图2所示，若将阴影部分（底面积都相同）切除后，剩余部分对水平桌面的压强的大小是（ ）
A．pA＞pB＞pC
B．pA＜pB＜pC
C．pB＞pA＞pC
D．pC＜p=pA
